WIP: feat(openssh): add ansible role

playbooks/openssh.yml

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+---
+- name: Ensure openssh is installed and configured
+  hosts: "{{ openssh_target | default('openssh') }}"
+  become: "{{ openssh_become | default(true) }}"
+  gather_facts: "{{ openssh_gather_facts | default(true) }}"
+  roles:
+    - role: finallycoffee.base.openssh

roles/openssh/defaults/main/main.yml

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+---
+openssh_sshd_config_file: "/etc/ssh/sshd_config"

roles/openssh/defaults/main/sshd.yml

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+---
+openssh_sshd_enable: true
+openssh_sshd_config_pubkey_authentication: true
+openssh_sshd_config_password_authentication: false
+openssh_sshd_config_challenge_response_authentication: false
+openssh_sshd_config_permit_root_login: false
+
+# Limits
+openssh_sshd_config_max_sessions: ~
+openssh_sshd_config_max_startups: ~
+
+# Hardening
+openssh_sshd_config_protocol: 2
+openssh_sshd_config_x11_forwarding: false
+openssh_sshd_config_allow_agent_forwarding: false
+openssh_sshd_config_allow_tcp_forwarding: false
+
+openssh_sshd_default_config:
+  PubkeyAuthentication: "{{ openssh_sshd_config_pubkey_authentication }}"
+  PasswordAuthentication: "{{ openssh_sshd_config_password_authentication }}"
+  ChallengeResponseAuthentication: >-2
+    {{ openssh_sshd_config_challenge_response_authentication }}
+  PermitRootLogin: "{{ openssh_sshd_config_permit_root_login }}"
+  MaxSessions: "{{ openssh_sshd_config_max_sessions }}"
+  MaxStartups: "{{ openssh_sshd_config_max_startups }}"
+  Protocol: "{{ openssh_sshd_config_protocol }}"
+  X11Forwarding: "{{ openssh_sshd_config_x11_forwarding }}"
+  AllowAgentForwarding: "{{ openssh_sshd_config_allow_agent_forwarding }}"
+  AllowTcpForwarding: "{{ openssh_sshd_config_allow_tcp_forwarding }}"
+
+openssh_sshd_merged_config: >-2
+{{ openssh_sshd_default_config | default({}, true)
+      | combine(openssh_sshd_config | default({}, true)) }}

roles/openssh/tasks/configure-sshd.yml

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+---
+- name: Configure sshd
+  ansible.builtin.lineinfile:
+    path: "{{ openssh_sshd_config_file }}"
+    regexp: "{{ openssh_sshd_config_regexp }}"
+    line: "{{ openssh_sshd_config_line }}"
+    state: present
+    validate: "sshd -Tf %s"
+  loop: "{{ openssh_sshd_merged_config | dict2items }}"
+  loop_control:
+    loop_var: "tuple"
+    label: "{{ tuple.key }}"
+  vars:
+    openssh_sshd_config_regexp: "^\\s*#?\\s*{{ tuple.key }}"
+    openssh_sshd_config_line: >-2
+      {{ openssh_sshd_config_line_commented }}{{ tuple.key }} {{ openssh_sshd_config_value }}
+    openssh_sshd_config_value_is_none: "{{ tuple.value is none }}"
+    openssh_sshd_config_line_commented: >-2
+      {{ openssh_sshd_config_value_is_none | ternary('#', '') }}
+    openssh_sshd_config_value: >-2
+      {{ (tuple.value is boolean) | ternary(
+           tuple.value | ternary('yes', 'no'),
+           tuple.value
+         )
+      }}

roles/openssh/tasks/install.yml

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+---
+

roles/openssh/tasks/main.yml

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+---
+- name: Ensure openssh is {{ openssh_state }}
+  ansible.builtin.include_tasks:
+    file: "install.yml"
+
+- name: Ensure sshd is configured
+  ansible.builtin.include_tasks:
+    file: "configure-sshd.yml"